Panasonic PV-V462 User manual

ORDERNO. MKE0201001C1
B3
VideoCassette Recorder
PV-V462 / PV-V4602 / PV-V4622 / PV-V4612S/ PV-V4022-K/
PV-V4522-K/ PV-V4612-K
SPECIFICATIONS
2002 Matsushita Kotobuki Electronics Industries Ltd. All rights

reserved. Unauthorizedcopying and distribution isaviolation of
law.
1. SAFETY PRECAUTIONS
GENERALGUIDELINES
1. IMPORTANTSAFETY NOTICE
Therearespecial components usedinthisequipmentwhichare
importantfor safety. These parts aremarkedbyinthe
SchematicDiagrams, CircuitBoard Layout, ExplodedViewsand
ReplacementParts List. Itisessential that these criticalparts
shouldbereplacedwithmanufacturer’sspecifiedparts toprevent
shock, fireor otherhazards. Donotmodifytheoriginal design
withoutpermission ofmanufacturer.
2. AnIsolation Transformershouldalwaysbeusedduring the
servicing ofVCR whose chassisisnotisolatedfrom theAC
powerline. Use atransformerofadequate powerrating as this
protects thetechnicianfrom accidents resulting inpersonalinjury
from electrical shocks. Itwill alsoprotect VCR from being
damagedbyaccidental shorting that mayoccur during servicing.
3. Whenservicing, observetheoriginal leaddress. Ifashortcircuit
isfound, replace all parts whichhavebeenoverheatedor
damagedbytheshortcircuit.
4. Afterservicing, see toitthat all theprotectivedevices suchas
insulation barriers, insulation papersshieldsareproperly
installed.
5. Afterservicing, make thefollowing leakagecurrentchecks to
preventthecustomerfrom being exposedtoshock hazards.
LEAKAGECURRENTCOLD CHECK
1. Unplug theACcord and connect ajumperbetweenthetwo
prongson theplug.

2. Measuretheresistance value, withanohmmeter, betweenthe
jumperedACplug and eachexposedmetalliccabinet parton the
equipmentsuchas screwheads, connectors, control shafts, etc.
Whentheexposedmetallicparthas areturn pathtothechassis,
thereading shouldbebetween1M and 5.2M . Whenthe
exposedmetal does nothaveareturn pathtothechassis, the
reading must beinfinity.
LEAKAGECURRENTHOTCHECK
(See figure 1.)
1. Plug theACcord directlyintotheACoutlet. Donotuse an
isolation transformerfor thischeck.
2. Connect a1.5k , 10 Wresistor, inparallel witha0.15 F
capacitor, betweeneachexposedmetallicparton theset and a
good earthground, as showninfigure1.
3. Use anACvoltmeter, with1k /V or moresensitivity, tomeasure
thepotential across theresistor.
4. Check eachexposedmetallicpart, and measurethevoltageat
eachpoint.
5. Reverse theACplug intheACoutlet and repeat eachoftheabove
measurements.
6. Thepotential at anypointshouldnotexceed0.75 V RMS. A
leakagecurrenttester(Simpson Model 229 or equivalent) maybe
usedtomake thehotchecks. Leakagecurrentmust notexceed1/
2mA. Incase ameasurementisoutsideofthelimits specified,
thereisapossibilityofashock hazard, and theequipmentshould
berepairedand recheckedbeforeitisreturnedtothecustomer.
Figure 1
2. PREVENTIONOF ELECTRO-STATICDISCHARGE

(ESD) TO ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
Some semiconductor(solidstate)devices canbe damagedeasilybystatic electricity. Such
components commonlyare calledElectrostaticallySensitive (ES)Devices. Examples of typical
ES devices are integratedcircuits, some field-effecttransistorsand semiconductor"chip"
components. The following techniques shouldbe usedto helpreduce the incidence of
component damage causedbyelectrostatic discharge (ESD).
1. Immediatelybeforehandling anysemiconductor componentor
semiconductor-equippedassembly, drainoff anyESDon your
bodybytouching aknownearthground. Alternatively, obtainand
wearacommerciallyavailabledischarging ESDwrist strap,
whichshouldremoveelectrostaticchargefor potential shock
reasonsprior toapplying powertotheunitundertest.
2. Afterremoving anelectrical assemblyequippedwithES devices,
place theassemblyon aconductivesurface suchas aluminum
foil, topreventelectrostaticchargebuildup or exposureofthe
assembly.
3. Use onlyagrounded-tipsoldering iron tosolderor unsolderES
devices.
4. Use onlyanantistaticsolderremoval device. Somesolder
removal devices notclassifiedas "antistatic(ESDprotected)"can
generate electrical chargesufficienttodamageES devices.
5. Donotuse freon-propelledchemicals. These cangenerate
electrical charges sufficienttodamageES devices.
6. DonotremoveareplacementES device from its protective
packageuntil immediatelybeforeyou arereadytoinstall it. (Most
replacementES devices arepackagedwithleadselectrically
shortedtogetherbyconductivefoam, aluminum foil or
comparableconductivematerial).
7. Immediatelybeforeremoving theprotectivematerial from the
leadsofareplacementES device, touchtheprotectivematerial to
thechassisor circuitassemblyintowhichthedevice will be
installed.
CAUTION:Besureno powerisappliedtothechassisor circuit,
and observeall othersafetyprecautions.

8. Minimizebodilymotionswhenhandling unpackagedreplacement
ES devices. (Otherwise harmless motion suchas thebrushing
togetherofyour clothes fabricor thelifting ofyour footfrom a
carpetedfloor cangenerate staticelectricity(ESD)sufficientto
damageanES device).
"NOTEto CATVsysteminstaller:
This reminderis providedto call the CATVsysteminstaller’s attention to Article 820-22 of the
NEC thatprovides guidelines forpropergrounding and, inparticular, specifies thatthe cable
ground shall be connectedto the grounding systemof the building, as close to the point of
cable entryas practical."
3. OPERATIONGUIDE
4. SERVICE NOTES (PLEASE READ)
4.1. SERVICE NOTES
4.1.1. SIMPLIFIEDFAULT FINDINGDATA
implifiedSelf-Diagnostic Systemfacilitates finding the cause of the fault. A3-digitfaultcode
will be displayedinF.I.P.
The SimplifiedFaultfinding data is storedinthe MemoryIC (IC6005). This data is clearedafterit
is displayed, and thenthe POWER button is pressedback on.
1. Withpowerturnedoff, press CH DOWNbutton on VCR (for over3
secondsifVCR isnotinshutoff condition).
Fig. 1-1
2. Faultcode(3-digitnumber)will bedisplayedinF.I.P. as shown.
Fig. 1-2
Fig. 1-3

Fig. 1-4
Fig. 1-5

3. When1to4listedinLock codeoccurs, Lock data will bestored
intheMemoryIC(latest Lock data only).
Note:
1. Lock data will bekeptaftertheACCord isunplugged.
2. When1to4listedinLock codeoccursfor thefirst time, theVCR
does notgo intoVCR shut-off condition. Ifitoccursagainwithina
minute, theVCR goes intoVCR shut-off condition. Then, theVCR
stopsand all VCR function buttonsexceptfor powerbecomenon-
operational.
3. Lock data will beclearedat thefirst poweron operation afterlock
codeisdisplayedinFIP.
4.1.2. USAGE SCREENMODE
Function displayedon the TVmonitor:
-thetotal elapsed”Cylinderrotation ”time(inhours)
1. Withpowerturnedon and no cassette, press CH DOWNbutton on
VCR and 7keyon remote together.
(TheUSAGE SCREENwill bedisplayedon theTV Monitor.)
Fig. 2

Note:
1. Afterreplacing theCylinderUnit, press COUNTERRESETbutton
on remote inthismode. Total elapsed"Cylinderrotation" time(in
hours) will beclearedto0.
2. Torelease from UsageScreenMode, press anyoperation button
on VCR or insertacassette tapeinthismode. TheVCR will return
tonormal operation mode.
4.1.3. EEPROM IC(IC6005), MAINC.B.A. REPLACEMENT NOTE
Afterreplacing EEPROMIC (IC6005)orMainC.B.A., be sure to performthe "PGSHIFTER
ADJUSTMENT"inELECTRICALADJUSTMENTprocedures.
4.1.4. SERVICEPOSITION
4.1.4.1. Service Position
CAUTION:
HOTCIRCUIT(Primarycircuit) exists on theMainC.B.A.
Use extremecaretopreventaccidental shock whenservicing.
4.1.4.1.1. Service Position (1)
Fig. 3-1
4.1.4.1.2. Service Position (2-1)
(Normal Frame Model)
Fig. 3-2-1

4.1.4.1.3. Service Position (2-2)
(Wide Frame Model)
Fig. 3-2-2
Note:
1. Itispossiblethat theS-TabSW. maynotworkcorrectlyinService
Position (2-1), (2-2). (Recording cannotbedone). Inthiscase,
shorttheS-TabSW. Pinson thefoil sideoftheMainC.B.A. toturn
thisSW. on. Fig. 3-3

2. Place thetapebetweentheCassette UpAss’yand MainC.B.A. to
get astability.
Fig. 3-4
4.1.5. HOT CIRCUIT
Primarycircuitexists on the MainC.B.A.
This circuitis identifiedas "HOT"on the C.B.A. and inthe Service Manual. Use extreme care to
prevent accidental shock whenservicing.
4.1.6. SERVICEMODE
Inorderto inhibitdetection of the Supply& Takeup Photo Transistors, Reel Sensor, and
CylinderLock, press and holdFF button and CH DOWN buttons on VCR togetherover5
seconds inpoweroff condition.
Fig. 4-1
The powercomes on and the unitgoes into service mode.
Inthis mode, Mechanismmovement canbe confirmed. Whenremoving Cassette UpAss’y, it
canbe confirmedwithout a cassette.